Explanation:
In order to put a fraction in simplest form, you must find the GCF of the fraction.
The GCF is the Greatest Common Factor, or what the biggest number that both the numerator and the denominator can be divided by.
For this fraction, the GCF would be 3.
Now, divide 135/228 by the GCF, or by 3.
In the end, you will have 45/76.
Therefore, 135/228 simplified is 45/76.